Doorlock



Dec. 8, 1931 F. JEWELL 1,835,946

DOORLOCK Filed Oct. 29, 1928 2 Sheets-Sheet 1 ENVENTOR FrankJewall B! I I Z 4 a a ATTol qNEYfi Dec. 8, 1931. F. JEWELL DOORL-OCK Filed Oct. 29, 1928 2 Sheets-Sheet 2 I INVENTOR Frank Jewell ATTORNEYS Patented Dec 8, 1931 PATENT OFFICE FRANK J'EWELL, OF DETROIT, MICHIGAN DOOELOCK 7 Application filed. October 29, 1928. Serial No. 315,810.

The present invention pertains to a novel door locking mechanism, having special reference to that type of locking means which is applicable to automobile doors although it 6 may be employed in numerous cases and is not to be confined to that particular use alone.

The primary object of the present invention is to provide a door locking mechanism which may be entirely enclosed in the latch operating handle to function in such manner that when locked the handle is free to turn without affecting the latch bolt and which causes the handle to be capable of-operating the latch bolt when in the unlocked position. The handle locking mechanism is constructed in a manner which makes it applicable to any form of door employing a sliding latch bolt, the mechanism removing all possibility of an unauthorized person gaining access through the door, the only access being attained by inserting the-proper key whereby to unlock the mechanism and render the handle capable of operating the latch bolt.

A further object of the present invention is to provide a latch operating handle for doors employing a sliding latch bolt which contains mechanism for rendering the handle capable or incapable of actuatin the latch bolt to open the door. The loc "ng mechanism is contained in the operating handle and is so constructed that it makes the handle operative by the insertion of a key or by operating according to a predetermined plan. The device may be secured by locking means which is accessible only from the interior of the automobile to render the handle operative or inoperative in relation to the latch bolt, this embodiment being commonly used for the door adjacent the operator of an automobile.

With the above recited objects in view, and

others which are subsidiary thereto or result ant therefrom and which will become apparent as the description progresses, my invention is fully disclosed and set forth in the following description with reference to the accompanying drawings, in which Figure 1 is a cross sectional view through a door, illustrating the sliding latch bolt and showing the handle locked in an inoperative position; i

Figure 2 is an end view of the handle illustrating the location of the locking means;

Figure 3 is a cross sectional view through the sliding latch bolt casing and door,, being illustrative of the driving connection between the handle and the latch bolt;

Figure at is a cross section on the line 4-4: of Figure 2;

Figure 5 is a cross section on the line 55 of Figure 1;

Figure (Sis a cross section on the line 6-6 .of Figure 1;

Figure 7 is a cross section on the line 7-7 of Figure l;

' Figure 8 is a cross section on the line 88 of Figure 1;

Figure 9 is a cross section on the line 99 of Figure l, and

Figure 10 is a vertical cross section through a door equipped with a slightly modified form of my invention.

The numeral 1 in the drawings indicates the wooden portion of an automobile door which is enclosed in the usual sheet metal sides 2, according to the ordinary construction in automobile doors. The wooden ortion 1 is gouged out to form the usual sliding latch bolt retaining recess into which is inserted a casing 8 for supporting the sliding latch bolt 4, the bolt being provided with a downwardly extending lug 5. The latch bolt and door construction above described is all of conventional design and merely serves as an illustration of one application of the present invention which is employed to open the door from the outside, it being understood that independent means is provided for opening the door by operating the latch from the inside of the door.

The latch operating handle 6 is provided with a hub 7 which is retained in a recess in the door by means of washers 8 which are oval shaped lock 11, the bore in the hub being correspondingly oval shaped as indicated in Figure 9 of the drawings, the purpose being to prevent rotation of the lock 11 within the handle and further to maintain the look so that the latch 12 is in line with the recess 13 for a purpose which will bethe hollow portion 17 of the handle hub 7,

this portion being circular in cross section as clearly indicated in Figure 5 of the drawings. To provide an operative connection between the handle 6 and the latch bolt 4 it is therefore merely necessary to provide a connection between the rollback l4 and the lock 11, the connection consisting of a stem 18 which is attached to the barrel of the lock 11 as at 19 and has the opposite end squared as at 20 and extending into the rollback 14, the rollback being provided with a central bore which is circular as at 21 and squared as at 22 A pin 23 is held transversely in the stem 19 to maintain a coil spring 24, which encircles the stem, in a position where it exerts pressure which tends to enlarge the space between the locking member 11 and the rollback 14.

In the operation of the device, as described and in the position illustrated, by turning the handle 6 no movement is imparted to the sliding latch bolt 4 owing to the manner in which the squared portion 20 of the stem 18 extends into the circular bore 21 in the rollback 14. To unlock the device the proper 13. The removal of the latch 12 from the recess 13 permits the pressure of the spring 24 to move the lock 11 outwardly, the stem 18 is correspondingly moved therewith and the squared portion 20 on the stem enters the squared portion of the bore 22 in the rollback 14. When the parts are in the above de-' scribed position it is apparent that rotation of the handle 6 will rotate the rollback 14 and rotation of the rollback 14 will slide the latch bolt 4-. The handle 6 is rendered op erative or inoperative by moving the lock 11 so that the squared portion 20 extends into the squared bore 22 or into the circular bore 21 respectively.

In Figure 5 of the drawings is illustrated a means for preventing access being had to the latch bolt 4 or the rollback 14 from the outside of the door in event of sufiicient handle to result in its severance from the door. This precautional means consists of a cover plate 25, pivoted as at 26 whereby it will fall by force of gravity to cover the opening giving access to the latch bolt and rollback 14 when the handle is removed. The plate normally rests against the hub 7 until such time as it is removed when it swings upon its pivot to rest against a stop pin 27 which is so located that it will hold the cover plate 25 in the protective position.

In Figure 10 of the drawings is illustrated a slightly modified form of my invention employing the same principle, the handle and hub are installed in a similar manner as to that above described and are employed to operate a similarly designed sliding latch bolt. This embodiment provides a means for locking or unlocking the handle, the means be ing accessible from only the inside of the door and consisting of a stem 30'provided with a finger piece 31. The stem 30 extends through the rollback 14 and into a bore 32in the handle, the stem being slidable longitudinally and being provided with indentations 33 and 33 into one of which enters a spring actuated stop member 34. The rollback 14' is constructed having a central bore which is squared as at 35 and circular as at 36, the bore 32 in the handle being squared as at 37. The stem 30 is substantially circular in cross section with the exception of the squared portion 38 which engages the squared recess 35 in the rollback, arid the squared portion 39 which at all times engages in the squared recess 37 in the handle. 3

The device when in the position illustrated in Figure 10 is adapted to move the sliding latch bolt 4 by turning the handle, to lock the device in order to render the handle incapable of operating the sliding latch bolt the stem 30 is retracted by means of the finger piece 31. Retraction of the stem causes the stop member 34 to engage in the indentation 33 in which position the squared portion 38 is received in the circular recess 36 in the rollback where it is free to turn without imparting movement to the rollback. The device when in this position has no operative connection between the rollback and the handle, leaving the latter free to turn while the sliding latch bolt remains stationary.

Although specific embodiments of my invention have been illustrated and described it is to be understood that various alterations may be made in the details of construction without departing from the spirit of the invention as depicted in the appended claims.

What I claim is 1. A door lock comprising a sliding latch bolt, a roll-back adapted to engage said slid ing latch, a keyway formed in said rollback, a stem extending through said rollback, a keyformed on said stein and adapted to engage said rollback in said keyway, a spring adapted to engage said stem in a manner to normally move said key on said stem into said keyway, and a key operating locking mechanism contained in the operating handle and attached to said stem for moving and holding said stem so that said key out of said keyway in a manner whereby releasing of said mechanism permits the spring to move the latter so that it projects out of said handle.

2. A door lock comprising a sliding latch bolt, a rollback adapted to engage said sliding bolt whereby rotation of said rollback retracts said bolt, said rollback having a central bore formed with a squared portion and a circular portion, a stem extending through said rollback, a squared portion formed on one end of said stem, a spring adapted to normally maintain said stem with its squared portion in the square portion of the bore whereby rotation of said stem rotates said rollback, and a key operated locking mechanism contained in said handle adapted to move said stem longitudinally to and hold it in a position where the squared portion on said stem extends into the circular portion of said bore whereby rotation of said stem does not affect said rollback, said spring being adapted to move said stem and locking mechanism when the latter is released so that the latter projects out of the end of the handle.

3. A door lock comprising a sliding latch bolt, a rotatable rollback adapted to operate said latch bolt, a hollow handle, a stem, a spring mounted in said hollow handle and exerting pressure to move said stern into operative engagement with said rollback, a lock barrel slidably and nonrotatably' mounted relative to said handle and connected to said stem, said lock barrel having a key operated latch bolt, a recess in said handle receiving said latch, said recess being located so that said lock barrel holds said stem out of engagement with said rollback when said latch bolt is received in said recess, said spring being adapted to move said stem and barrel so that a portion of the latter projects out of the hollow handle when the latch has been retracted from said recess.

4. A door lock comprising a sliding latch bolt, a rollback adapted to engage said sliding bolt whereby rotation of said rollback retracts said bolt, a central opening extending through said rollback, a portion of said central opening being a circular bore and a' vportion being angular, a stem extending through said central opening, an angular end formed on said stem adapted to fit into said angular portion of said opening, a spring adapted to move said stem longitudinally so that said angular portion on said stem enters said angular portion of said opening in said rollback in a manner whereby rotation of said stem causes rotation of said rollback, a handle having a hollow portion adapted to surround said stem, a lock barrel non-rotatably mounted within said hollow handle and connected to said stem, a key operated latch bolt in said barrel adapted to be received in a 

